Skyhawk L4-121 2.0L (1986)
Valve Body: All Technical Service Bulletins
A/T Control Valve Assembly - Cleaning and Servicing
Bulletin 86-7-2
Date
Mar. '86
Ref. No. 86-085-7
SUBJECT:
ALL THM TRANSMISSION/TRANSAXLE ASSEMBLIESCONTROL VALVE ASSEMBLY CLEANING/SERVICING
PROCEDURES
MODELS AFFECTED: ALL THM TRANSMISSION MODELS
The following information is provided as a recommended procedure for cleaning/servicing all automatic transmission/transaxle control valve assemblies
when:
^
Diagnosis indicates a stuck or sticking valve(s).
^
A transmission/transaxle pump or torque converter malfunction requires a complete unit overhaul.
EQUIPMENT AND WORK AREA
Workbench
^
Must be clean and free of any foreign material (dirt, grease, or other contaminants).
^
Work area should be large enough to allow for the disassembly of the control valve assembly and the layout of each valve train.
Tools
^
Should be cleaned with solvent before and during the disassembly procedures to ensure they are free of any grease or dirt that may
contaminate the control valve assembly.
Solvent and Parts Cleaning Tank
^
Must be clean and free of contamination from engine or other components.
^
Must be clean and filtered if solvent is recirculated.
Safety Equipment
^
Safety glasses and rubber gloves are the minimum requirements to ensure personal safety.
CLEANING PROCEDURES
Tools Required
-
Appropriate Service Manual
-
Awl
-
Micro fine lapping compound
-
Tapered #49 drill bit
-
Pencil type magnet
-
Small flat blade screwdriver
-
Small non-abrasive parts cleaning brush
Cleaning And Disassembly
1.
Remove the control valve assembly from the transmission/transaxle following the procedures contained in the appropriate Service Manual.
2.
Inspect the attaching bolts and bolt holes. Remove metal chips or foreign material that may be present.
3.
Place the control valve assembly in a clean tank, and with clean solvent thoroughly wash the entire outer surfaces of the valve body.
4.
Remove the control valve assembly from the solvent and dry it using compressed air. (CAUTION SHOULD BE EXERCISED WHEN USING
COMPRESSED AIR ON SOLVENTS).
